nilfs2: issue discard request after cleaning segments
This adds a function to send discard requests for given array of
segment numbers, and calls the function when garbage collection
succeeded.
Signed-off-by: Jiro SEKIBA <jir@unicus.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 8173fae..3f88401 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -481,6 +481,8 @@
seq_printf(seq, ",order=strict");
if (nilfs_test_opt(sbi, NORECOVERY))
seq_printf(seq, ",norecovery");
+ if (nilfs_test_opt(sbi, DISCARD))
+ seq_printf(seq, ",discard");
return 0;
}
@@ -550,7 +552,7 @@
enum {
Opt_err_cont, Opt_err_panic, Opt_err_ro,
Opt_nobarrier, Opt_snapshot, Opt_order, Opt_norecovery,
- Opt_err,
+ Opt_discard, Opt_err,
};
static match_table_t tokens = {
@@ -561,6 +563,7 @@
{Opt_snapshot, "cp=%u"},
{Opt_order, "order=%s"},
{Opt_norecovery, "norecovery"},
+ {Opt_discard, "discard"},
{Opt_err, NULL}
};
@@ -614,6 +617,9 @@
case Opt_norecovery:
nilfs_set_opt(sbi, NORECOVERY);
break;
+ case Opt_discard:
+ nilfs_set_opt(sbi, DISCARD);
+ break;
default:
printk(KERN_ERR
"NILFS: Unrecognized mount option \"%s\"\n", p);